This recommendation is from Bakery Manis, where you will find tons of great Hawaii dining suggestions for vegan and vegan-friendly. See personal details of her Maui listings here.
This swanky restaurant is known for its fish, but they have many dairy-free options, and sound to be very accomodating for vegan and vegetarian needs. The incredible views, atmosphere, and food seem to compensate for the "fancier" prices.
Location: 2000 Plantation Club Dr., Kapalua, HI